Head-to-head test
EcoFlow DELTA 2 Max vs BLUETTI Apex 300
Despite costing $650 less, the DELTA 2 Max actually delivers energy at a higher lifetime cost per kWh than the Apex 300 — $0.21 against $0.11 — because the Apex 300's extra capacity and cycle count outrun its higher sticker price.
Full profiles: EcoFlow DELTA 2 Max → · BLUETTI Apex 300 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
$1,049.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
$1,499.00 · direct from BLUETTI
down from $1,699 · 12% below usual
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
The EcoFlow DELTA 2 Max costs $1,049 and the BLUETTI Apex 300 costs $1,699 — a $650 gap that looks like it should make the DELTA 2 Max the value pick. Run the actual lifetime math and it flips: the Apex 300 delivers energy at $0.11 per kWh against the DELTA 2 Max's $0.21.
That happens because the Apex 300 isn't just bigger, it's built to last far longer — 6,000 cycles against 3,000, and 2,764.8Wh against 2,048Wh. Over its full service life it delivers 16,589kWh total against the DELTA 2 Max's 6,144kWh, a 170% larger total that dwarfs its 38.7% higher price tag.
The DELTA 2 Max answers back with weight: 50.7 lbs against 83.78 lbs, a unit you can move room to room without thinking about it. It's the more genuinely portable machine. Whether that matters more than the Apex 300's lower cost per kWh and larger scenario coverage depends on whether this unit is going to travel with you or sit in one spot.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Typical price
That's why cost per lifetime kWh actually drops as the sticker price rises here: $0.11 for the Apex 300 against $0.21 for the DELTA 2 Max. The pricier unit is the better deal once you measure it in energy delivered, not dollars spent.
The Apex 300 costs $650 more than the DELTA 2 Max ($1,699 vs $1,049), a 38.7% higher priceThe Apex 300 delivers 16,589kWh over its lifetime against the DELTA 2 Max's 6,144kWh, a 170% larger total
Why it mattersBuyers optimizing for total cost of ownership rather than checkout price should default to the Apex 300 despite the higher number on the box.
A spec-sheet noise rating and a real-world one can describe two different machines. Buyers comparing the DELTA 2 Max's 30dB against the Apex 300's 45dB on paper are not comparing like for like; under real charging load, the gap likely narrows or reverses.
The DELTA 2 Max's spec sheet lists 30dB noiseIndependent testing reports the fans running significantly louder under heavy load or charging, around 52dB, with a quieter charging mode that extends charge time as the workaroundA1
Why it mattersAnyone choosing based on the quieter-looking spec should discount it and expect real charging noise closer to 52dB, per field testingA1.
Cost per kWh and scenario coverage are telling the same story from two directions: the Apex 300's larger capacity is doing real work in this matchup, not sitting unused.
Weekend Camping needs about 2,100Wh; the DELTA 2 Max covers 121% of that load, meaning it falls shortThe Apex 300 covers 89% of the same load, meaning it clears it, and it also wins 8-Hour Blackout and Remote Workday outright
Why it mattersBuyers whose outages or trips resemble any of those three scenarios should count the Apex 300's capacity as functional headroom, not excess.
The Apex 300's cost and scenario advantages assume the unit mostly stays where you put it. Move it often and its 83.78 lbs, 33 more than the DELTA 2 Max carries, can still be the deciding spec, whatever it costs per kWh.
The Apex 300 weighs 83.78 lbs against the DELTA 2 Max's 50.7 lbs, a 1.65x differenceThe DELTA 2 Max's own owners report no structural battery degradation after six months of real useA3
Why it mattersBuyers who relocate their unit between a vehicle, a deck, and indoors regularly should weight the DELTA 2 Max's portability over the Apex 300's cheaper lifetime cost.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: The higher-priced Apex 300 is actually the cheaper unit per kWh — the central honesty point on this page.
cost / lifetime kWh
The Apex 300 costs $650 more at checkout and still ends up cheaper per kWh delivered — $0.11 against $0.21 — because its extra 3,000 cycles and 716.8Wh of capacity outrun the price gap over the unit's full life.
Cost per warranty year runs the other way on the sticker ($360 against $259), but that's the same story told in annual installments rather than lifetime totals. If you're keeping either unit for its full rated life, the Apex 300 is the better-value machine despite looking like the splurge.
Your Life, Your Pick
Selected because: Apex 300 wins three of six scenarios outright, matching its lifetime-cost advantage.
The Apex 300 wins Weekend Camping, 8-Hour Blackout, and Remote Workday outright, while the DELTA 2 Max only matches it on CPAP Overnight and Tailgate Party — loads small enough that either unit's capacity is overkill. Van Life Daily beats both.
Three wins to zero, on top of the cheaper lifetime cost, is a hard combination for the DELTA 2 Max to argue with unless the deciding factor is something other than power delivery — namely, weight.
Portability & Form Factor
Selected because: 83.78 lbs vs 50.7 lbs is the Apex 300's one clear weakness against this opponent.
weight
50.7 lbs against 83.78 lbs is the DELTA 2 Max's clearest structural advantage in this matchup — 33 lbs less to pick up every time. Six months of owner use reports no measurable battery degradation at that weight class, so the portability doesn't come at the cost of durabilityA3.
The Apex 300's weight isn't a flaw so much as a different design intent: it's built to sit as home or RV backup, not to ride along on a camping trip. Buyers should decide which role they're actually filling before the price and scenario numbers settle it for them.
What the Specs Don't Tell You
Selected because: Four cards fire, including noise and warranty-value signals worth surfacing plainly.
rated cycles
The noise card favors the DELTA 2 Max on paper — 30dB against the Apex 300's 45dB — but field testing under heavy load measured the DELTA 2 Max closer to 52dB, with a quieter mode available that trades noise for charge timeA1. Treat the spec-sheet gap with some skepticism.
UPS switchover and warranty-value cards both favor the Apex 300 — a faster 10ms transfer against 20ms, and more coverage per dollar over its lifetime. Weight is the one card that fires clearly for the DELTA 2 Max.
Brand Trust
Selected because: Cross-brand pair with genuinely different support, app, and ecosystem tradeoffs.
EcoFlow runs the largest ecosystem and community in the category, with a ~31K-member Reddit community and the fastest-charging tech in the space; support is polarized between smooth prepaid-label replacements and longer waits depending on the case. BLUETTI's app is tied for the best-rated in the category, but its support is the more inconsistent of the two, running heavily email-based with China-timezone delays.
Buying either direct from the manufacturer, rather than a marketplace reseller, tends to produce smoother support outcomes for both brands. Neither company's support record is a clean win over the other — pick based on the unit, not the logo.
Strengths & trade-offs
EcoFlow DELTA 2 Max
Strengths
- +Costs $650 less
- +Lighter by 33.1 lb
Trade-offs
- –Weaker inverter (-1,440W) limits appliance compatibility.
- –Shorter-lived battery — rated for 3,000 charge cycles vs the Apex 300's 6,000, so it wears out sooner.
BLUETTI Apex 300
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$650) than the DELTA 2 Max.
- –Significantly heavier (+33.1 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on six real-world scenarios. Here's which unit survives your actual life.
SCN-01 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Apex 300
The DELTA 2 Max needs more than it has for a typical camping weekend; the Apex 300 clears the same load with room to spare. This is where the Apex 300's extra capacity stops being theoretical and starts being the reason to buy it.
Battery budget usedlower = more headroom
LOAD Phone Charger 15W×6h · LED Lights 40W×8h · Box Fan 75W×14h · CPAP Machine 40W×16h
SCN-02 · 8 hours · needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
Apex 300
Both survive the night. The Apex 300 finishes at 70% used with 705Wh left — 43% of a second night. The DELTA 2 Max finishes at 94% with 96Wh, 6% of a second night. If your outages tend to run past one evening, that difference is the whole argument between them.
Battery budget usedlower = more headroom
LOAD Fridge 150W×8h · Router + Modem 20W×8h · LED Lights (4 bulbs) 40W×6h · Phone Charger 15W×3h
SCN-03 · 8 hours · needs 320Wh
CPAP Overnight
Sleep therapy without interruption — the #1 medical use case
DELTA 2 Max
A CPAP is about 40W for eight hours, so both of these cover the night several times over — capacity isn't the question here, and the percentages are a formality. What matters is the box next to your pillow, and the only published difference is a rating: the DELTA 2 Max is rated 30dB against the Apex 300's 45dB. Each is the maker's own published rating, and the makers do not measure the same way, some quoting a best case and some a figure under load, so neither number describes a 40W draw and the two are not really comparable. Treat them as a reason to look for hands-on reports before either one goes next to a bed, not as a difference you can count on hearing.
Battery budget usedlower = more headroom
LOAD CPAP Machine 40W×8h
SCN-04 · 8 hours · needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
Apex 300
The Apex 300 clears the workday at 39% used, banking 1,440Wh — late work, extra calls, or a second laptop charge without arithmetic. The DELTA 2 Max at 52% also finishes, with 831Wh of slack for the unplanned.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
Either unit
Both handle game day easily. Since capacity isn't the deciding factor, weight is: at 50.7 lbs the DELTA 2 Max is the one you'll be glad you brought. Fan noise under load is worth a listen too — it's audible in the lulls between songs.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
Neither unit covers this scenario's 4,685Wh: the DELTA 2 Max comes up 2,944Wh short (about 37% covered), the Apex 300 2,335Wh (50%). Treat this as partial cover — enough for the essentials in it, not the whole list.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
For this load: Apex 300 runs 11.5h vs 8.5h.
$1,699 list · direct from BLUETTI
Modeled from the spec record — same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.¹
Essentials
The basics you need runningscale 0–156.7hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–31.3hHigh-Draw Appliances
These reveal the real limitsscale 0–2.4h¹ Runtime = (capacity × 0.85) ÷ appliance watts. Within each group, all bars share one time scale (the group's longest runtime), so lengths are comparable across appliances; identical runtimes collapse into a single blue/orange bar. Actual runtime varies with battery age, temperature, and simultaneous loads — see methodology.
Conclusion
July 15, 2026
Verdict: the Apex 300, on Power Score margin
The Apex 300 costs $650 more up front ($1,699 against $1,049) but comes out cheaper per lifetime kWh delivered, and it clears Weekend Camping, an 8-Hour Blackout, and a Remote Workday where the DELTA 2 Max falls short or barely scrapes by. It also switches over faster and takes a 2,400W solar ceiling against 1,000W. The honest catch is weight: at 83.78 lbs against 50.7 lbs, the Apex 300 is 1.65 times heavier, and it's genuinely louder on paper — 45dB against the DELTA 2 Max's 30dB. Buyers who need to move their unit regularly, or who value the DELTA 2 Max's quieter spec sheet, should weigh that tradeoff seriously. For anyone treating this as a stationary backup unit, the Apex 300's extra capacity earns back its premium.
Today the Apex 300 is $1,499, $200 under its typical $1,699. The verdict weighs typical prices, not today's. Prices checked 1 day ago.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 15, 2026. The links below open EcoFlow's and BLUETTI's current prices.
$1,499.00 · direct from BLUETTI
down from $1,699 · 12% below usual
Last checked 1 day ago. Prices move — check before you buy.
or check the DELTA 2 Max price$1,049.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated July 15, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): CPAP, Tailgating, Apartment Balcony.
Full specifications
ᵈ Derived: price ÷ rated capacity. See the data behind our comparisons →
Comparison ToolAdd more power stations, side by sideOpen Tool →How these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it — no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews — see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity × 0.85 inverter efficiency) ÷ device wattage. Solar recharge estimates assume panels deliver 70% of rated output. Cold weather, battery age, and stacked loads reduce real-world results.
Power Score
Computed from 14 published spec dimensions, weighted per use-case bench. Higher is better; a unit must meet a bench's minimum threshold to be rated.
See the full weight table and data sourcing on our methodology page →Class ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews — no buyer opinions feed it. We score every station on size-independent quality (value, output, portability, endurance, ports, warranty, and more), then percentile-rank it against the other units in its capacity class, so a class-leading compact unit and a class-leading whole-home unit can both earn 5★. Here, DELTA 2 Max rates 3.8/5 (28th percentile of 26 Large-class units), and Apex 300 rates 5.0/5 (99th percentile of 26 Large-class units).
How the class ranking is computed →Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
Apex 300: 83.8 lbs Is a Commitment
At 83.8 lbs, this is manageable but not fun to move. That's heavier than a large checked suitcase. How much it costs you depends on whether it rolls — wheels and a telescoping handle change the job completely at this weight, and our spec record doesn't track them, so look at the product photos before you plan on carrying it from the car.
The DELTA 2 Max's 30dB Spec Doesn't Hold Under Load
Field testing measured the DELTA 2 Max running closer to 52dB during heavy loads or charging, well above its 30dB spec, with a Quiet Charging mode available that trades noise for charge time. Compare the Apex 300's 45dB against that real-world figure, not the sanitized one.
UPS Switchover: ≤10ms vs ≤20ms
Both list a UPS mode, at different rated speeds. The Apex 300 is rated ≤10ms — quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. The DELTA 2 Max is rated ≤20ms — fine on paper for routers and most electronics; the fussiest PC power supplies sit right at this line. If a computer with unsaved work is the thing being protected, the stated class is worth the attention; nothing here is a lab result.
Same Coverage Window, Different Value
Both carry a 5-year warranty, but the Apex 300 returns more energy per dollar of that coverage over its full life, even though its annual cost per warranty year is higher.
Battery Lifespan in Real Years
The Apex 300 is rated for 6,000 cycles vs 3,000. In real life: at daily use, that's 16.4 vs 8.2 years. At weekend use (twice a week), it's 58 vs 29 years. One caution reading years across different sizes: a cycle is 2,765Wh on the Apex 300 and 2,048Wh on the DELTA 2 Max, so count lifetime energy — roughly 16,589 kWh against 6,144 kWh over the rated life. After hitting the cycle limit, the battery doesn't die — it drops to ~80% of original capacity, which is still very usable.
Full record above — the Test Desk pick is the Apex 300.
Check Apex 300 price →or check the DELTA 2 Max priceOwnership Analysis
What happens after you buy — true cost of ownership, brand trust, and growth potential.
Lifetime value
Service lifeyears at one full cycle per day
Lifetime energy delivered
Cost per delivered kWh
│ warranty ends · Reaching the cycle rating means ~80% capacity remains — degraded, not dead.
Analyst note
The DELTA 2 Max is cheaper to buy, but the Apex 300 is cheaper to own. At $0.1/kWh over its lifetime vs $0.17/kWh, the Apex 300's higher cycle life and capacity make each dollar go further over the years.
Brand trust
EcoFlow
Ecosystem
Largest in portable power — 12-15 models across DELTA Pro, DELTA 3, and RIVER 3 series, plus solar panels and smart home panels
Support
US-based phone/email/chat support (1-800-368-8604). Experiences are polarized — many report hassle-free prepaid-label replacements, but others report long waits and refurbished units sent for new claims. Pro tip: buying from Costco or Amazon gives you a stronger return safety net.
Community
Largest community in the space — Reddit r/Ecoflow_community (~31K members), multiple Facebook groups, and an official community forum
App experience
Rated 4.6/5 iOS (~8,400 ratings) · 4.2/5 Android (~17,000 ratings)
Unique strength
Fastest-charging technology (X-Stream), deepest product ecosystem, and most active innovation cadence. At the very top of the range, the DELTA Pro Ultra platform stacks batteries and inverters into whole-home backup — a flagship path, not a line-wide feature.
Worth knowing
Tested subscription paywalls for advanced app features in early 2025 before community backlash paused the plan. No parts or service offered out of warranty.
BLUETTI
Ecosystem
One of the broadest lineups — 15-20+ models from budget (AC2A) to flagship portable (Apex 300, 2764.8Wh). Includes specialized products: vehicle solar hubs, sodium-ion cold-weather units, and balcony storage systems.
Support
The most inconsistent support in the space. Heavily email-based with China timezone delays. Some users get smooth, efficient service; others report weeks of troubleshooting runarounds, being offered discounts on new units instead of repairs, and confusing third-party purchase claim processes. Buying direct from Bluetti's website tends to produce better support outcomes.
Community
Active and growing — Reddit r/bluetti has a dedicated community. Second-largest after EcoFlow in engagement.
App experience
Rated 4.5/5 iOS and Android — tied for best app experience in the category. V3.0 UI redesign was well-received.
Unique strength
Among the best capacity-to-price ratios available — several Elite and Apex units are the lowest $/Wh in the catalog. Widest product diversity including industry-firsts like sodium-ion cold-weather units and dual solar+alternator vehicle hubs. LFP across the rest of the range, though rated cycle life spans 2,500 (EB3A) to 6,000, and it varies WITHIN the Elite range rather than tracking it — the Elite 300 and Elite 200 V2 are rated 6,000 while the Elite 30 V2, Elite 10 Mini, Elite 320 and Elite 400 are rated 3,000+ and the Elite 100 V2 4,000+, so check the specific model. Dual-voltage (120V/240V) in flagships.
Worth knowing
Customer support inconsistency is the #1 risk factor. Older/discontinued units may become unrepairable — no spare parts policy for some models. Some reports of erratic communication from support agents.
Analyst note
Neither brand has a support record clean enough to be the deciding factor here. Base the decision on the unit's fit for your use case and let the brand be a tiebreaker, not the headline.
Growth path
DELTA 2 Max
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 2,048Wh.
Accepts up to 1,000W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
Apex 300
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 2,765Wh.
Accepts up to 2,400W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
Expansion batteries are BLUETTI-specific. You're investing in the BLUETTI ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Both expand, but the Apex 300's higher solar ceiling (2,400W vs 1,000W) gives it the stronger off-grid growth path — more panels can feed a bigger bank as it grows.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 2 Max
Fan noise is the DELTA 2 Max's most consistent complaint — reviewers describe it getting loud, around 52dB, under heavy loads or while charging, with a Quiet Charging mode available that trades speed for volumeA1. On the plus side, AC charging is genuinely fast: 0 to 80% in about 50 minutes and a full charge in roughly 80A2.
Six months into ownership, testers report no structural degradation in the LiFePO4 cells — it still felt as solid as day oneA3. The overall read is a versatile, still-worth-buying unit with real caveats rather than an outright recommendation or passA4.
“Fast AC wall charging — 0 to 80% in about 50 minutes and a full charge in roughly 80 minutes.”
Sources
powerstationadvisor.com · pcworld.com · thesolarlab.com · protoolsadvisor.com · trailandkale.com
BLUETTI Apex 300
The Apex 300's most consistent owner complaints aren't about power delivery — they're about firmware. Owners report updates locking the unit into Backup mode, throwing an Error 004 mid-charge, and breaking Bluetooth/Home Assistant integrations shortly after updatingB1B2B3B4 — a pattern worth knowing about before you're mid-outage on the latest firmware.
On the hardware side, testers expecting loud cooling instead found the fans relatively tame under loadB5, though the modular design does mean carrying it takes two hands and real effort even with the built-in handlesB6. The lack of face-mounted USB/DC ports is a recurring gripe too — you'll want the $300 Hub D1 accessory to get them backB7.
“I was using Bluetti-bt until the latest Bluetti firmware update. I then started having disconnects.”
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- Solid LFP durability, fast charging, and ecosystem/expandability are the praise; loud fans under heavy load or charging are the recurring complaint. [DELTA 2 Max · 3 entries]
- Multiple owners report firmware updates causing app glitches, mode-lock issues, error codes, or Bluetooth/Home Assistant disconnects shortly after updating. [Apex 300 · 4 entries]
- Reviewers consistently flag the lack of built-in USB/DC ports as a design tradeoff requiring costly add-on accessories (Hub D1, Hub A1). [Apex 300 · 4 entries]
- The unit's extreme weight (~85 lbs) is repeatedly described as making it barely 'portable' and hard to carry alone. [Apex 300 · 2 entries]
- A1
“Fan noise is a significant issue — cooling fans can get loud, around 52 dB during heavy loads or charging; a Quiet Charging mode reduces noise but extends charge time, and giving it 6 inches of clearance helps airflow.”
powerstationadvisor.com / pcworld.com — DELTA 2 Max review · 2025-2026 · [negative]
- A2
“Fast AC wall charging — 0 to 80% in about 50 minutes and a full charge in roughly 80 minutes.”
thesolarlab.com / protoolsadvisor.com — DELTA 2 Max review · 2025-2026 · [positive]
- A3
“LiFePO4 chemistry rated for 3,000+ cycles to 80% with superior thermal stability; after 6 months of real use there was no structural degradation and it felt as solid as day one.”
powerstationadvisor.com / trailandkale.com — DELTA 2 Max review · 2025-2026 · [positive]
- A4
“Reviewers say it's still worth buying but with caveats — a versatile unit with expandability and ecosystem compatibility.”
thesolarlab.com / powerstationadvisor.com — DELTA 2 Max review · 2025-2026 · [mixed]
- B1
“I updated my Apex 300 to the latest firmware yesterday. Now it's stuck in 'Backup' mode... Now when I go into the app to try to change it back, it flashes to...”
BLUETTI Community forum — 'Apex 300 stuck in Backup mode after last firmware update' · 2025-11 · [negative]
- B2
“When the system reached 97% charge, I decided to install the firmware updates. After the update completed, the charging stopped and I received Error 004.”
BLUETTI Community forum — 'Error E004 Apex 300' · 2025-11 · [negative]
- B3
“I was using Bluetti-bt until the latest Bluetti firmware update. I then started having disconnects.”
GitHub bluetti-official/bluetti-home-assistant issue #95 — 'APEX 300 and Hub A! now working' · 2026-05 · [mixed]
- B4
“Problem is every time I connect to the power station it shows that I still have an update, and I need to tap to upgrade which then tells me I am up to date.”
BLUETTI Community forum — 'Check For Update App issue' · 2025-09 · [negative]
- B5
“Some units sound like small jet engines under load, but the Apex 300's fans are relatively tame.”
Techspective — 'Bluetti Apex 300 with B300K Review' · 2025-09 · [positive]
- B6
“It's heavy, no question, but the handles and modular battery design make it manageable.”
Techspective — 'Bluetti Apex 300 with B300K Review' · 2025-09 · [mixed]
- B7
“Not having DC or USB ports on the face is a tradeoff. The Hub D1 solves the problem—but it's an additional $300 accessory that you then have to bolt on after the fact.”
Techspective — 'Bluetti Apex 300 with B300K Review' · 2025-09 · [negative]
Research compiled July 15, 2026.
What Owners Actually Report
Drawn from 78 comments on independent review channels — not from retailer reviews, which skew to the first week of ownership. Each line is our summary of one commenter's claim, linked to the original. We record what they said, including where it contradicts the spec sheet.
EcoFlow DELTA 2 Max
74 claims from 55 comments · 60 from owners · 20 with figures
- Runtime
- 13 · 0% negative
- Solar input
- 10 · 20% negative
- Price & value
- 11 · 45% negative
- Expandability
- 8 · 15% negative
- Noise
- 5 · 58% negative
What owners complain about
Its own MPPT is limited to a mere 60 VOC from solar panels.
Solar inputmeasuredowner19 agreedsource →
Delta 2 Max is promised at 30 dB but measured 42 dB in his hands.
Noisemeasuredowner5 agreedsource →
Got a 5kWh rival for less than he paid for a DELTA 2 Max with extra battery.
Price & valueowner17 agreedsource →
What owners praise
Feeding his lead-acid UPS from it stretches desktop runtime from 8 minutes to 4 hours.
Runtimemeasuredowner8 agreedsource →
Bought the Delta 2 Max for $899 on Black Friday; the Delta 2 was $399.
Price & valuemeasuredowner21 agreedsource →
Takes 500-1000W from a DIY 48V bank over XT60i, far cheaper than the official spare battery.
Expandabilitymeasuredowner19 agreedsource →
BLUETTI Apex 300
36 claims from 23 comments · 18 from owners · 6 with figures
- Price & value
- 10 · 8% negative
- Solar input
- 6 · 53% negative
- Inverter & surge
- 2 · 0% negative
- Build quality
- 2 · 0% negative
- Runtime
- 2 · 100% negative
What owners complain about
TV, router, Tablo and Firestick drain it from 100% in 7-9 hours; runtime figures are lies.
Runtimemeasuredownersource →
Dropping to a 60V PV max is a deal killer versus the 150V per string they run on the AC300.
Solar inputowner1 agreedsource →
App is portrait-only.
App & firmwareownersource →
What owners praise
Two paralleled units give 7,680W and run dryer, 2-ton AC or oven plus fridges and sump pump.
Inverter & surgemeasuredowner5 agreedsource →
$2,600 for two units plus $659 for the Hub A1 was worth the extra over the Anker.
Price & valuemeasuredowner5 agreedsource →
Three Apex 300s with a Hub A1 give him 18kW solar input and 12kW output.
Solar inputmeasuredownerafter 1 months10 agreedsource →
Claims are weighted by how specific they are, whether the commenter owns the unit, and how many readers agreed. Comments that mention a product under a rival's review count for more, because the commenter had no reason to be there. This is what buyers report, not our test results — for measurements we ran ourselves, see the methodology.
Who Should Buy Which
Buy the DELTA 2 Max if you…
- →You move the unit regularly and 50.7 lbs against 83.78 lbs is the deciding factor over a $0.10 per-kWh cost difference.
- →Your loads top out around CPAP or tailgate-party scale, where the DELTA 2 Max's smaller capacity is already more than enough.
Buy the Apex 300 if you…
- →You want the lower lifetime cost per kWh and your use case includes weekend camping, extended blackouts, or a full remote workday.
- →The unit is staying in one place as home or RV backup, so its 83.78 lbs is a placement decision, not a packing problem.
If neither fits
If your daily draw looks like van life at roughly 4,685Wh, both units run out well short of covering it — the DELTA 2 Max needs 269% of what it holds, the Apex 300 needs 199%. Look at a dedicated van power system or a larger flagship unit instead.
The Bottom Line
The number that decides this matchup isn't the $650 price gap — it's the $0.10-per-kWh gap running the other direction. The Apex 300 costs more to buy and less to own, and it wins three of six real-world scenarios the DELTA 2 Max can't fully cover.
The DELTA 2 Max's honest edge is weight: 50.7 lbs against 83.78 lbs is 33 lbs less to lift every time the unit moves. If portability is the actual job, take the DELTA 2 Max and don't look back at the per-kWh math. If it's staying put, the Apex 300 earns its premium.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the cheaper EcoFlow DELTA 2 Max actually the better value?
Not by lifetime cost. It costs $650 less at checkout, but its cost per lifetime kWh is $0.21 against the Apex 300's $0.11, because the Apex 300's larger capacity and higher cycle count deliver more total energy over the unit's life. The DELTA 2 Max wins only if you're optimizing for checkout price alone.
Which is quieter, the DELTA 2 Max or the Apex 300?
On paper, the DELTA 2 Max at 30dB against the Apex 300's 45dB. In practice, field testing measured the DELTA 2 Max running closer to 52dB under heavy load or while charging, which narrows or erases that gap depending on how hard you're pushing it.
Can the DELTA 2 Max handle a weekend camping trip?
Not comfortably — a typical camping load needs about 2,100Wh, and the DELTA 2 Max only covers about 82% of that on a single charge. The Apex 300 clears the same load with capacity to spare.
Is the Apex 300 too heavy to travel with?
At 83.78 lbs against the DELTA 2 Max's 50.7 lbs, it's the harder of the two to carry in and out of a vehicle regularly. If your unit needs to travel, the DELTA 2 Max is the more practical choice regardless of its slightly higher per-kWh cost.
Does the Apex 300's app have the same firmware issues as the DELTA 2 Max?
The Apex 300 has its own recurring firmware issues — owners report updates causing Backup-mode lockouts, error codes, and Bluetooth disconnects. Neither brand has a clean record here; it's worth checking current firmware notes before committing to either.
Brand matchup
EcoFlow vs BLUETTI: measured across every matchup →Where to buy
EcoFlow DELTA 2 Max
$1,049.00
$1,049.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
BLUETTI Apex 300Pick
$1,499.00
$1,499.00 · direct from BLUETTI
down from $1,699 · 12% below usual
Last checked 1 day ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.